HEIDENHAIN TNC 640 (34059x-04) - Manual (Page 286)

Programming: Q Parameters
9.1 Principle and overview of functions
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TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 3/2014
Calling Q parameter functions
When you are writing a part program, press the “Q” key (in the
numeric keypad for numerical input and axis selection, below the
+/– key). The TNC then displays the following soft keys:
Function group Soft key Page
Basic arithmetic (assign, add,
subtract, multiply, divide,
square root)
288
Trigonometric functions 290
Function for calculating circles 291
If/then conditions, jumps 292
Other functions 296
Entering formulas in the part
program
327
Function for machining
complex contours
See User’s
Manual for Cycles
The TNC shows the soft keys Q, QL and QR when
you are defining or assigning a Q parameter. First
press one of these soft keys to select the desired
type of parameter, and then enter the parameter
number.
If you have a USB keyboard connected, you can
press the Q key to open the dialog for entering a
formula.